Earthquake Information Bulletin, Volume 23, Issue 4

A-alert A-level alert a.m. MST alert status Aleutian aseismic buildings Colorado counties creepmeter damaging earthquake Earth's magnetic field earthquake hit earthquake prediction earthquake struck earthquake was centered earthquake was felt earthquake was located effects were experienced effects were noted Emergency Services Erzincan experiment foreshock on October geomagnetic field geomagnetic storms Hawaii hazards hotline hypocenters Idaho Intensity km east km north km southwest Kuril Islands light earthquake occurred located about 60 Magnetic Storm magni magnitude 4.7 shock magnitude 6 earthquake magnitude 7.1 earthquake mainshock March 13 Mexico Middle Mountain minor earthquake occurred moderate earthquake North Anatolian fault northwest November October 20 Office of Emergency Oregon Parkfield Earthquake Photograph public warning quake quake was centered quake was felt quake was located recorded region reported felt Richard Andrews San Andreas fault satellites solar wind status levels strong earthquake sunspot tion U.S. Geological Survey USGS zone